Scattered thunderstorms developed in a semi-moist atmosphere during maximum afternoon heating. A lone storm pulsed severe and produced nickel size hail and heavy rain in Galva, Illinois.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS DVN wrote it up.
Scattered thunderstorms developed in a semi-moist atmosphere during maximum afternoon heating. A lone storm pulsed severe and produced nickel size hail and heavy rain in Galva, Illinois.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Quad Cities, IA wrote its last area forecast discussion before the first event at Sep 9, 2:10 PM CST, 2 hours 5 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE QUAD CITIES IA IL 310 PM CDT SAT SEP 9 2006 .SYNOPSIS... 18Z SFC ANALYSIS PLACES FRONTAL ZONE FROM NORTHERN OHIO THROUGH SOUTHERN IA INTO CENTRAL NE. IFR CIGS STILL PERSIST IN THE FAR NORTH WITHIN MOIST/COOL LLVL NE FETCH POST FRONTAL. THE LOW CLOUDS AND NORTHEAST WINDS HAVE KEPT TEMPS IN CHECK IN THE NORTH WITH L60S STILL IN THE INDEPENDENCE...TO MONTICELLO TO DUBUQUE CORRIDOR. MEANWHILE IN THE SOUTH WITH SOME SUNSHINE AT TIMES...TEMPS HAVE RESPONDED BY WARMING IN THE L/M 80S FROM FORT MADISON TO BURLINGTON...GALESBURG AND MACOMB. WATER VAPOR SHOWS WEAK WAVE MOVING EAST THROUGH NORTHERN MO WITH REFLECTION AT SFC IN FORM OF WEAK LOW PRESSURE CENTER NEAR MACOMB. HEATING AND CONVERGENCE FROM LOW FUELING SCT SHOWERS WITH AN ISOLD STORM POSSIBLE. OTHERWISE...RADAR SHOWED AN EXPANSIVE AREA OF SHOWERS ADVANCING E/NE THROUGH FAR NORTHEAST MO INTO SOUTHEAST IA ATTIM. PCPN DRIVEN LARGELY BY ISENTROPIC LIFT/WARM ADVECTION. WATER VAPOR ALSO SHOWS STRONGER SHORTWAVE TROUGH CHURNING OVER THE CENTRAL PLAINS. THIS SYSTEM WILL BE THE FOCUS FOR WIDESPREAD RAIN LATE SUN THROUGH MON WITH POTENTIAL FOR SIGNIFICANT/HEAVY RAINS OVER PORTIONS OF THE CWA. && .SHORT TERM...TONIGHT AND SUNDAY... SFC BOUNDARY TO REMAIN IN VICINITY OF SOUTHEAST IA/WEST CENTRAL IL THIS EVE BUT AS WEAK WAVE PASSES LATER TNGT ANTICIPATE THE FRONT TO BEGIN PUSHING SOUTHWARD AGAIN INTO MO BY 12Z SUN. AS MENTIONED EARLIER THE RAIN AREA ADVANCING E/NE INTO SOUTHEAST IA IS DEPICTED WELL BY ISENTROPIC LIFT ON 310K SFC FROM GFS...AND THUS FOLLOWED CLOSELY FOR PCPN TRENDS TNGT. HAVE GONE CATEGORICAL IN THE FAR SOUTH THIS EVE AND WITH TIME TNGT SHIFT LIKELY POPS INTO THE CENTRAL AND EVENTUALLY NORTH LATE WITH SURGE OF ISENTROPIC LIFT/WARM ADVECTION. DO ANTICIPATE SOME WEAKENING IN INTENSITY WITH SUNSET AND LOSS OF HEATING. FOR MOST AREAS TONIGHT DUE TO CLOUDS WENT AT OR JUST ABOVE MINS OF THIS MORNING. ANTICIPATE EXPANSION OF MVFR TO IFR CIGS NORTH TO SOUTH TNGT WITH LIFR POSSIBLE ALONG WITH SOME FOG...BUT CLOUDS AGAIN MAY LIMIT COVERAGE AND PRECLUDE ANY DENSE. ON SUNDAY...MAIN MECHANISM FOR PCPN WILL BE WARM ADVECTION/ISENTROPIC LIFT AND THIS FOCUSED MAINLY NORTHERN 1/3 TO 1/2 ALONG AND ON THE COOL SIDE OF H85 FRONT. HAVE THEREFORE GONE LIKELY POPS NORTH TAPERING OFF TO CHC POPS ALONG AND SOUTH OF I 80. WOULDNT BE SURPRISED THOUGH IF NOT MUCH PCPN OCCURRED OVER SOUTHEAST IA...WEST CENTRAL IL AND NORTHEAST MO. AS FOR MAX TEMPS...WENT BELOW LOWEST GUIDANCE IN THE NORTH WITH CLOUDS/RAIN AND WITH POTENTIAL FOR BREAKS HESITANT TO GO TO COOL IN THE SOUTH AND STAY TOWARD BLEND FOR NOW. I 80 CORRIDOR MAY BE THE MOST CHALLENGING FOR HIGHS. ..05.. && .LONG TERM...SUNDAY NIGHT THROUGH NEXT SATURDAY... INITIALLY QUITE BUSY WITH FRONTAL BOUNDARY NEAR THE CWFA. NEXT WAVE TO MOVE UP ALONG THE FRONT SUNDAY NIGHT/MONDAY BRINING ANOTHER ROUND OF RAIN TO THE AREA. HEAVIEST SHOULD BE ACROSS THE NORTHWEST THIRD TO 40 PERCENT OF THE CWFA. DEPENDING ON THE MODEL...THE WAVE WILL EITHER BE CLOSED OR AN INVERTED TROF. IF THE LATTER OCCURS...WAVE WOULD BE SLOWER TO ARRIVE AND LEAVE WHICH WOULD RESULT IN HEAVIER RAINFALL. IF THE ECMWF IS CORRECT...THE RAIN WOULD NOT END UNTIL WED AFTERNOON/NIGHT. THE GROUND SHOULD TAKE THE FIRST ROUND OR TWO OF RAINFALL AS IT IS A TAD ON THE DRY SIDE. LATER SHIFTS WILL NEED TO WATCH EVOLVING SYSTEM CAREFULLY IN CASE HEADLINES ARE NEEDED FOR WATER. RAIN TO SLOWLY END FROM WEST TO EAST MONDAY NIGHT INTO TUESDAY NIGHT AS UPPER LOW SLOWLY EXITS THE REGION. UNTIL THEN THERE SHOULD BE PLENTY OF CLOUDY WX ACROSS THE AREA. UPPER RIDGE BUILDING INTO THE AREA FOR MID WEEK TO BRING DRY WX AND WARM SOUTHERLY FLOW. SOME UNCERTAINTY EXISTS FOR NEXT FRI/SAT. GFS SUGGESTS RAIN POTENTIAL WHILE ECMWF/UKMET SUGGEST DRY. FOR NOW WILL GO WITH SILENT 20 POPS. ..08.. && .DVN WATCHES/WARNINGS/ADVISORIES... IA...NONE. IL...NONE. MO...NONE. 05/08
HAZARDOUS WEATHER OUTLOOK...CORRECTED NATIONAL WEATHER SERVICE QUAD CITIES IA IL 458 AM CDT SAT SEP 9 2006 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-101000- BENTON IA-BUCHANAN IA-BUREAU IL-CARROLL IL-CEDAR IA-CLARK MO- CLINTON IA-DELAWARE IA-DES MOINES IA-DUBUQUE IA-HANCOCK IL- HENDERSON IL-HENRY IA-HENRY IL-IOWA IA-JACKSON IA-JEFFERSON IA- JO DAVIESS IL-JOHNSON IA-JONES IA-KEOKUK IA-LEE IA-LINN IA-LOUISA IA- MCDONOUGH IL-MERCER IL-MUSCATINE IA-PUTNAM IL-ROCK ISLAND IL- SCOTLAND MO-SCOTT IA-STEPHENSON IL-VAN BUREN IA-WARREN IL- WASHINGTON IA-WHITESIDE IL- 458 AM CDT SAT SEP 9 2006 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL ILLINOIS...NORTHWEST ILLINOIS...WEST CENTRAL ILLINOIS...EAST CENTRAL IOWA...NORTHEAST IOWA...SOUTHEAST IOWA AND NORTHEAST MISSOURI. .DAY ONE...TODAY AND TONIGHT SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON. MOST OF THE SHOWERS AND THUNDERSTORMS WILL OCCUR NEAR A FRONTAL BOUNDARY STALLED OVER SOUTHEAST IOWA AND WEST CENTRAL ILLINOIS. THE SHOWERS AND THUNDERSTORMS WILL CONTINUE INTO THE OVERNIGHT HOURS. SEVERE THUNDERSTORMS ARE NOT EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH SATURDAY SHOWERS AND ISOLATED NON-SEVERE THUNDERSTORMS ARE EXPECTED OVER MUCH OF THE AREA FROM SUNDAY INTO EARLY TUESDAY AS SLOW MOVING STORM SYSTEM MOVES FROM THE CENTRAL PLAINS THROUGH THE MIDDLE MISSISSIPPI VALLEY. THERE IS POTENTIAL FOR SIGNIFICANT RAINFALL FROM THIS SYSTEM FROM LATE SUNDAY INTO MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED TODAY OR TONIGHT. DLF
The Quad Cities radar (KDVN), 47 km away, was scanning. The volume nearest the first event began at 22:18 UTC.
1 heavy rain, 1 hail. Local standard time, as filed.
Minor street flooding from 2.25 inches of rain in 45 minutes.
Nickel size hail and winds gusting to 35 knots (40 mph).
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2006Every state in 2006This day in weather historyWarnings in Illinois, September 2006
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5534066, 5534065.